DemonFX is a Hong Kong-based effects pedal manufacturer that produces clones and close interpretations of popular boutique guitar and bass pedals at budget prices. The company operates two related brands, Demon and DemonFX, and positions itself as an affordable alternative for players who want access to sounds associated with high-end designs without the boutique pricing.

The catalog spans overdrive, distortion, compressor, preamp, boost, EQ, chorus, reverb, delay, and tuner pedals, with many units directly modeled on well-known circuits. Notable examples include the BE-ODX (a take on the Friedman BE-OD), bass preamp pedals modeled on the Darkglass B7K series, a mini chorus inspired by the Analog Man clone of the Boss CE-2, and a range of Tube Screamer-style overdrives. The pedals are sold primarily through Reverb, eBay, Amazon, and third-party dealers such as Ploutone rather than through traditional distribution.

Discussion on forums like TalkBass and PedalPCB generally describes the build quality as solid for the price point, with components and tones that players compare favorably to the originals they mimic. Because the company reproduces trademarked or copyrighted designs without licensing, it is a polarizing presence in the pedal community and does not have formal artist endorsement relationships.

Demonfx has 19 products cataloged on Equipboard, including Overdrive Effects Pedals, Bass Effects Pedals, and Compressor Effects Pedals. Their gear is featured by 3 artists, with the strongest followings in Rock and Blues. Notable users include Lee Malia, Violet Mayugba, and Allan Van Cleave.